Added info about growing counters

Author: nastena1606

Diff for: docs/backups-pitr.md

@@ -53,6 +53,8 @@ For how to restore a database to a specific point in time, see [Restore the clus
 
 The point-in-time recovery Pod has statistics metrics for binlogs. They provide insights into the success and failure rates of binlog operations, timeliness of processing and uploads and potential gaps or inconsistencies in binlog data.
 
+Note that point-in-time recovery Pod doesn't aggregate the statistics data. After the Pod restart, counters will be restarted and will increase until the next Pod restart.
+
 The available metrics are:
 
 * `pxc_binlog_collector_success_total` - The total number of successful binlog collection cycles. It helps monitor how often the binlog collector successfully processes and uploads binary logs.